Simultaneous Measurements of the Torsional Oscillator Anomaly and Thermal Conductivity in Solid He-4

Zmeev, D. E. and Golov, A. I. (2011) Simultaneous Measurements of the Torsional Oscillator Anomaly and Thermal Conductivity in Solid He-4. Physical review letters, 107 (6). ISSN 0031-9007

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Abstract

In these torsional oscillator experiments, the samples of solid He-4 were characterized by measuring their thermal conductivity. Polycrystalline samples of helium of either high isotopic purity or natural concentration of He-3 were grown in an annular container by the blocked-capillary method and investigated before and after annealing. No correlation has been found between the magnitude of the low-temperature shift of the torsional oscillator frequency and the amount of crystalline defects as measured by the thermal conductivity. In samples with the natural He-3 concentration, a substantial excess thermal conductivity over the usual T-3 dependence was observed below 120 mK.

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
88290
Deposited By:
Deposited On:
16 Oct 2017 15:18
Refereed?:
Yes
Published?:
Published
Last Modified:
01 Jan 2020 10:29